Eaton MD660E92ES Motor drive isolation transformer - UL Listed
Part Number: MD660E92ES
Quick Summary
MD660E92ES motor drive isolation transformer provides scalable power isolation for drive systems in industrial automation applications. Engineers often contend with transients, voltage dips, and electrical noise from high‑power drives that threaten control accuracy and uptime. This unit carries UL Listed safety certification and uses a DT-3 dry‑type design in a 920E frame for rugged, ventilated performance, with electrostatically shielded windings and WS35 weather shield option. With 60 Hz three‑phase operation, +5% and -5% taps, and a 660 kVA rating, it delivers reliable line side stabilization and protection for critical motor drives while easing installation, maintenance, and compliance planning.
Product Information
Extended Description
MD660E92ES Eaton: Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 460 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 460Y/266V, 150°C, 660 kVA, Al windings, Elec. Shield, Frame: 920E, uses WS35
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD660E92ES
UPC
786680087226
Product Length/Depth
36.23 in
Product Height
75 in
Product Width
44.2 in
Product Weight
2185 lb
Warranty
Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.
Certifications
UL Listed
Coil material
Aluminum
Design
DT-3
Frame
920E
Tap size
1 at +5% FCAN, 1 at -5% FCBN
Type
Dry Type Distribution, Drive Isolation Transformer
Frequency rating
60 Hz
Phase
Three-phase
Primary voltage
460 V
Secondary Voltage
460Y/266 V
Temperature rise
150 °C rise
Volt ampere rating
660 kVA
Special features
Electrostatically shielded
Weathershield
WS35
Feature: 660 kVA three‑phase rating at 60 Hz. Benefit: Enables robust drive isolation for large motor loads with predictable secondary voltage, reducing downtime and improving system reliability in packaging, metals, and process applications. Application: Suitable for high‑demand motor control centers and distribution panels where stability matters. Feature: Tap settings of +5% FCAN and -5% FCBN. Benefit: Allows precise voltage regulation to compensate for site fluctuations, improving motor performance and reducing energy waste. Application: Ideal where feed voltages vary or where downstream equipment requires tight voltage tolerance. Feature: DT‑3 dry‑type construction in a 920E frame with ventilated cooling. Benefit: Eliminates oil handling and supports safer, maintenance‑friendly installations in crowded cabinets or outdoor enclosures. Application: Widely used in OEM drives and retrofit projects with space constraints. Feature: Aluminum windings with electrostatic shielding. Benefit: Lower winding weight, improved thermal response, and EMI reduction to protect control electronics. Application: Critical for PLCs, sensors, and instrumentation near the transformer. Feature: WS35 Weathershield option and rugged enclosure compatibility. Benefit: Extends installation options to outdoor or harsh environments without compromising reliability. Application: Outdoor substations and remote drive rooms benefit from added weather protection. Feature: Frame 920E and standard electrical ratings (460 V primary, 460Y/266 V secondary). Benefit: Simplifies OEM integration and spare part planning, reducing installation time and lifecycle costs. Application: Consistent with common Eaton catalog dimensions for quick drop‑in replacements.
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FAQs
Install on a stable base within a ventilated area compatible with a 920E frame. Plan for a 36.23 in depth, 75 in height, and 44.2 in width footprint; ensure clearance for maintenance and WS35 weather shield if used. Heaviest section weighs about 2185 lb, so consider mechanical lifting and anchoring requirements per site safety standards.
The unit provides +5% FCAN and -5% FCBN taps to compensate for supply voltage variations. This enables tighter secondary voltage control (460Y/266 V) and improved motor performance, reducing overheating and misoperation of drive electronics when input voltage fluctuates.
Yes, with the WS35 weather shield option and ventilated dry‑type design, the transformer supports outdoor or semi‑outdoor installations in many industrial environments, while maintaining safe, reliable operation.
This product is UL Listed. No additional certifications are specified in the provided data, so verify site-specific regulatory requirements during procurement for CE, IP, or other standards as needed.
Warranty is Eaton’s standard policy: one year from installation or eighteen months from shipment, whichever occurs first (Policy 25-000). For ongoing support, consult Eaton technical services or your distributor for field service and spare parts guidance.